Loading tests in large range condition are not uniformly prescribed in various standards and treatment of experimental data usually runs diseconomy or unsafe.When the range is larger than 30% of the average value or the ratio of maximum and minimum is bigger than 1.3 the calculation for bearing capacity value,we can use methods such as outliers rejecting method or variation coefficient strength reduction method to calculate.Various examples show that the given formula is reasonable and easy to calculate，which can be used for determining the bearing capacity of various kinds of loading tests.